import 'dart:io';

import 'package:alice_screen/common/constant.dart';
import 'package:alice_screen/guide/guide_page.dart';
import 'package:alice_screen/routers/application.dart';
import 'package:alice_screen/routers/routers.dart';
import 'package:alice_screen/util/i18n/initialize_i18n.dart';
import 'package:alice_screen/util/i18n/localizations.dart';
import 'package:fluro/fluro.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

import 'data/models/index.dart';
import 'plugins/desktop/desktop.dart';

import 'package:window_size/window_size.dart' as window_size;

Future<void> main() async {
  
  if (Platform.isWindows) {

    // Desktop platforms are not recognized as valid targets by
    // Flutter; force a specific target to prevent exceptions.
    setTargetPlatformForDesktop(platform: TargetPlatform.fuchsia);

    // Try to resize and reposition the window to be half the width and height
    // of its screen, centered horizontally and shifted up from center.
    WidgetsFlutterBinding.ensureInitialized();
    window_size.getWindowInfo().then((window) {
      if (window.screen != null) {
        final screenFrame = window.screen.visibleFrame;
        const width = Constant.uiDesignWidth;
        const height = Constant.uiDesignHeight;
        final left = (screenFrame.width - width) / 2.0;
        final top = (screenFrame.height - height) / 2.0;
        final frame = Rect.fromLTWH(left, top, width, height);
        window_size.setWindowFrame(frame);
      }
    });
  }

  WidgetsFlutterBinding.ensureInitialized();

  //加载中英文数据源
  Map<String, Map<String, String>> localizedValues = await initializeI18n();

  runApp(MyApp(localizedValues: localizedValues));
}

class MyApp extends StatefulWidget {

  final Map<String, Map<String, String>> localizedValues;

  MyApp({Key key,
    @required this.localizedValues
  }) : super(key: key) {
    final router = Router();
    Routes.configureRoutes(router);
    Application.router = router;
  }

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  String _locale = 'zh';
  //切换语言
  onChangeLanguage() {
    if (_locale == 'en') {
      setState(() {
        _locale = 'zh';
      });
    } else {
      setState(() {
        _locale = 'en';
      });
    }
  }

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData.light().copyWith(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primaryColor: Colors.blue,
      ),
      darkTheme: ThemeData.dark(),
      localizationsDelegates: [
        MyLocalizationsDelegate(widget.localizedValues),//设置自己定义的代理
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,//用于兼容ios
      ],
      locale: Locale(_locale),//设置当前的语言
      supportedLocales: Constant.languages.map((language) => Locale(language, '')),
      // home: MyHomePage(onChangeLanguage: onChangeLanguage,),
      home: GuidePage(),
      onGenerateRoute: Application.router.generator,
    );
  }
}

class MyHomePage extends StatefulWidget {

  final VoidCallback onChangeLanguage;

  MyHomePage({Key key, this.onChangeLanguage}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  // final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  CounterModel _counter = CounterModel();

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter.add(1);
    });

    widget.onChangeLanguage();
  }

  @override
  Widget build(BuildContext context) {
    
    //初始化UI设计界面的宽和高
    ScreenUtil.init(context, width: Constant.uiDesignWidth,
      height: Constant.uiDesignHeight);
    
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(MyLocalizations.of(context).flutterDemoHomePage),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
